Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '424cadcb63405b0043c53561a5aac894b87d74224c3e09cd34c8ac7ffab4dd2e' 
  AND token = '6jbMndYzmPj3nEr4oJkCjRgtjKeAt/q8uJTOVnX7LC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}